Force AWS library to obtain region from environment inside docker cluster

问题

I’m trying to test a Java app running in a docker container on my desktop. The app runs fine if I execute it directly from my command line, but it fails when I try to run it inside a Docker container on my desktop. The error output shows that the library is requesting region information, then failing with this error:

com.amazonaws.SdkClientException: Unable to find a region via the region provider chain. Must provide an explicit region in the builder or setup environment to supply a region.

I am providing the region as an environment variable:

AWS_DEFAULT_REGION=us-east-2

If I hard-code the region, it works fine. (The library is successfully extracting the credentials from environment variables.)

回答1:

You need to set AWS_REGION, not AWS_DEFAULT_REGION. Default Region Provider Chain

回答2:

AWS is inconsistent in its implementation for this, as sometimes AWS_DEFAULT_REGION is required, other times AWS_REGION is required. For the AWS API for Java, use AWS_REGION. (Specify both to work in all situations.)

[h/t John Camerin who revealed this answer in comments on similar questions.]

cf. 44151982, 36354423, Github aws/aws-sdk-go#2103

来源：https://stackoverflow.com/questions/60532462/force-aws-library-to-obtain-region-from-environment-inside-docker-cluster